AP Physics 2mediummcq1 pt
A convex mirror has a focal length of -10 cm. If an object is placed 15 cm in front of the mirror, what is the image distance?
A.-6 cm
B.-30 cm
C.30 cm
D.6 cm
Explanation
Core Concept
Using the mirror equation 1/f = 1/do + 1/di, where f = -10 cm and do = 15 cm, we get 1/di = 1/(-10) - 1/15 = -0.1 - 0.067 = -0.167. Therefore, di = -1/0.167 = -6 cm.
Correct Answer
A-6 cm
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